Stainless steel pipe fitting air tightness automatic detection device

The utility model provides an automatic detection device for airtightness of a stainless steel pipe fitting, and belongs to the technical field of machinery. The problem that an existing detection device is not visual is solved. The device comprises a rack with a supporting plate, a detection pipe is vertically fixed on the upper side of the supporting plate, a stainless steel pipe fitting is vertically arranged in the detection pipe and pressed on the supporting plate, the upper end of the detection pipe is sleeved with a top cover, the inner wall of the top cover is tightly pressed on the top wall of the stainless steel pipe fitting to form sealing, and an air channel enabling the stainless steel pipe fitting to be communicated with the outside is formed in the top cover; a closed annular cavity is formed among the top cover, the detection pipe, the stainless steel pipe fitting and the supporting plate, and a pressure gauge used for detecting the pressure of the annular cavity is installed on the detection